乙酸酐 、
5-t-butyldiphenylsiloxymethyl-4',5'-dihydroxy-6'-methoxy-2,2-dimethyl-(3'R,3aR,4'S,5S,5'R,6S,6'R,6aR)-spiro[perhydrofuro[2,3-d][1,3]dioxole-6,2'-(3'H,6'H-pyran)]-3'-yl acetate 在
N-甲基吗啉 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
以76%的产率得到5-t-butyldiphenylsiloxymethyl-3',4'-di(methylcarbonyloxy)-6'-methoxy-2,2-dimethyl-(3'R,3aR,4'R,5S,5'R,6S,6'R,6aR)-spiro[perhydrofuro[2,3-d][1,3]dioxole-6,2'-(3'H,6'H-pyran)]-5'-yl acetate